54
MAXIN 24e & 28e
SECTION 11 L.P.G. INSTRUCTIONS
Min. Gas Rate
Max. Gas Rate
4.85 litres/h
1.63 litres/h
28e
1.52 litres/h
4.12 litres/h
24e
24e
28e
Polidoro NP12
Polidoro NP14
12 x 0.77
14 x 0.77
36.0 mbar
36.0 mbar
5.5 mbar
6.5 mbar
11.1 Gas Rates (LPG)
11.2 Burner Details (LPG)
Burner Pressure Max. Rate
Main Burner Injectors
Main Burner
11.4
11.4
11.4
11.4
11.4
GAS SUPPLY
GAS SUPPLY
GAS SUPPLY
GAS SUPPLY
GAS SUPPLY
A gas supply should be connected to the
boiler by a competent L.P.G. installer and
should be of sufficient size to supply the
boiler at its maximum output.
An existing supply should be checked by
the installer or L.P.G. supplier to ensure
that it can deal with the rate of gas supply
required for all the appliances when they
are in use at the same time.
11.5
11.5
11.5
11.5
11.5
GAS SUPPLY INSTALLATION
GAS SUPPLY INSTALLATION
GAS SUPPLY INSTALLATION
GAS SUPPLY INSTALLATION
GAS SUPPLY INSTALLATION
11.5.1
11.5.1
11.5.1
11.5.1
11.5.1
Inspect the entire installation including the
meter, test for soundness and purge.
11.6
11.6
11.6
11.6
11.6
CHECK BURNER PRESSURE
CHECK BURNER PRESSURE
CHECK BURNER PRESSURE
CHECK BURNER PRESSURE
CHECK BURNER PRESSURE
11.6.1
11.6.1
11.6.1
11.6.1
11.6.1
The heat inputs for high and low gas rates
are factory set to the maximum values
given in section 11.2 but it is necessary to
check/adjust this when commissioning the
appliance.
11.6.2
11.6.2
11.6.2
11.6.2
11.6.2
The maximum heat input may be reduced
by a simple adjustment to suit the system
load. This in no way affects the appliance
maximum which is always obtained in the
domestic hot water mode.
11.6.3
11.6.3
11.6.3
11.6.3
11.6.3
Turn off the main electrical supply. Gain
access to the interior as instructed in clause
5.7.2.
11.6.4
11.6.4
11.6.4
11.6.4
11.6.4
Locate the main burner pressure test point
fig. 20 and slacken the screw half a turn in
an anti clockwise direction. Attach a suit-
able pressure gauge. Turn on electricity
supply and fully open a domestic hot water
tap to operate boiler in dhw mode. Adjust
hot water control knob to it’s maximum
setting.
11.6.5
11.6.5
11.6.5
11.6.5
11.6.5
The pressure reading for maximum output
should be :
24e
24e
24e
24e
24e
36.0mbar 14.2in. w.g.
(Plus or minus 3.6mbar/1.4in. w.g.)
28e
28e
28e
28e
28e
36.0mbar 14.2in. w.g.
(Plus or minus 3.6mbar/1.4in. w.g.)
If the pressure is wrong it should be ad-
justed as instructed in clause 8.23. (N.B.
Whenever the maximum rate is adjusted
check and adjust the minimum rate too).
BS 6891
1988
Low pressure installation pipes
BS 6798
1987
Boilers of rated input not exceeding 60kW
BS 5449
Part 1
1990
Forced circulation hot water systems
BS 5546
1990
Installation of gas hot water supplies for
domestic purposes (2nd family gases)
BS 5440
Part 1
1990
Flues
BS 5482
Part 1
1994
Domestic Butane & Propane Gas burners in
permanent dwellings
11.3 RELATED DOCUMENTS
Burner Pressure Soft Light
Burner Pressure Min. C/H
Burner Pressure Min. DHW
16.7 mbar
16.7 mbar
5.1 mbar
4.3 mbar
